Quality Park Products Gummed Sealing Tape with Fiberglass, 3 x 375, Kraft, 8 Rolls of Tape (46083) Gummed sealing tape with fiberglass. Kraft sealing tape adheres quickly, evenly and permanently. The 1 5/8" core fits standard tape sealing machines. Requires moisture to activate the gum. Reinforced with fiberglass for extra strength.